Sectional mold for concrete construction.



Patented June 28, 1910.

3 SHEETS-SHEET 1.

ma a,

- I 6mm 7 F. s.v FARRAR. SEGTIONAL MOL D FOR GONGRETE GON$TRUGTION. APPLICATION FILED SEPT. 14, 1908. 962 560 Patented June 28,1910.

3 SHEETS-SHEET 2'.

1 '51 5 11.13 a i .:s I v ISO 6i 58 59 F. S. PARRAR. SEGTIONAL MOLD FOR GONORETE GONSTRUCTION.

APPLICATION FILED SEPT.14, 1908.

' Patented June 28, 1910. a SHEETS-SHEET a whim, 1

' grain material,

portions of a FRANK S. FARRAR, OF LYNDON, KANSAS.

SECTIONAL MOLD FOR CONCRETE CQNSTRUCTION.

Specification of Letters Patent.

Fatented June 28, .1910.

Application filed September 14, 1908. Serial No. 453,045.

To all whom it may concern:

Be it known that I, FRANK S. FARRAR, a citizen of the United States, residing at Lyndon, in the county of Usage and State of Kansas, have invented certain new and useful Improvements in Sectional Molds for Concrete Construction, of which the follow- 'ing is a specification.-

This invention relates to molds for plastic 1 taining portions in position;

Another object is to provide a retaining means for end walls of arched structures the size of which may be adjustably varied. 4

Another object is to provide novel means for holding adjacent ends of retaining sections in position.

Another object is to provide novel and desirable means for holding the extremities of mold sides in registry.

Another object is to rovide-a mold for cylindrical structures, a justable to vary the diameter of a structure without the necessity of special forms.

Another object is to provide a dome mold for use with cylindrical molds or without them, the dome molds being adjustable to vary the size as desired.

Another object of this invention is to provide a novel and desirable means for holding the sides of a wall mold in an adjustable spaced relation, this means forming also a tie member in the wall when the structure is completed. I

Another object is to provide a means for building a wall having an outer layer of fine backed by coarser material, in order to provide a wall impervious of moisture without involving great expense.

Other objects and advantages will be apparent from the following description, and it will be understood that changes in the specific structure be made Within the scope of the claims withplates to retain them shown and described mayout departing from the spirit of the inven tion.

In the drawings forming a portion of this specification, and in which like numerals of reference indicate similar parts in the several views, Figure 1 is an end view of the mold showing the arch and wall portions in position, Fig. 2 is a view at right angles to Fig. 1, Fig. 3 is a plan view of a form for an end wall, Fig. i is a view of a quarter section of the dome :t'orm, Fig. 5 is a detail of one of the links in the arch section, Fig. 6 is a detail edge View of one of the links,

Fig. 7 is a detail of the junction of the cross pieces and vertical supports with the base oi the arch, Fig. 8 is a cross section of one of the retaining mei'nbers, Fig. 9 is a view of a wall melt. in position and showing a wall gage in position therein, Fig. 10

is a plan view of three forms of tie means for engaging the support portions of wall molds in spaced relation, Fig. 11 is a detail view of a modified form of link for the sectional arch, able diaphragm for use in the mold to embrace materials of different kinds, Fig. 13 is a detail of a means for coengaging the end firmly in operative position, Fig. 14 is a modified device for holdmg the end plates in coengagement,-F1g. 15 1s a modified form of end retaining portion suitable for culvert, Fig. 16 is a modified form of means for securing end sections de- 1 tachably in position, Fig. 17 is a detail side view of a form of link for the outer portion of an arched form, Fig. 18 is a detail of gage for setting the links of the arch.

Referring to the drawings, there is shown a form for molding concrete structures, comprising an arch formed of links 1Q pivotally coengaged, the base of the arch being braced by a sectional cross piece. 11, and being supported upon upright members 12 detachably engaged therewith, as shown. The uprights 12 comprise spaced rods secured to each other at intervals by means of bolts engaged through the rods and through blocks 13 disposed between the rods 12 to hold them in spaced relation. The supports 12 may be made of any suitable form of metal, and as shown are formed arranged with one of the flanges on each in adjacent spaced relation, the remaining flanges extending outwardly. A detachable ground engaging portion is detachably' engaged with the upright 12 and comprises a Fig. 12 is a detail view or a movof small L beams I tudinallly;

rmed in the upper end thereof of angular shape adapted to engage detachably over the end of the upright 12, as shown.

ortions of the The adjacent L flange at their upper members 12 are perforate ends and adapted to engage with the flange carried by the cross piece 11. The cross piece 11 comprises two small L beams having their inner end portions disposed in overlapped relation, and provided with spaced openings 16 therethrough adapted for adjustable engagement by means of pins 17 engaged therethrough, as shown. Carried by the outer end of one of the beams 11 there is a block 18, said block having an upwardly extending car 19 having an opening therethrough and a downwar ly extending ear disposed therebeneath and having an opening therethrough, the upper ear beingadapted for engagement with the links 10 of the arch .portion, as shown, and the lower ear being adapted for engagement with the upright 12. The opposite member 11 carries at its outer end a similarblock having spaced ears 20 on the upper side thereof adapted for engagement with the links 10 and a single eartherebeneath adapt-- ed to engagement with the upright 12.

The links 10 are each similarly formed, and comprise a solid bar having a longiextending car 22 at one end thereof, and aving spaced cars 23 formed at the o posite end and adapted to engage slida ly over the ear 22 of a similar link, the cars 22 and 23 having concentric perforations 24 formed therethrough adapted to receive pins 25, as shown. Projecting inwardly of each link'at one end there is a lug 26 having a threaded opening therethrough extending longitudinally of the body portion of the link and having a set screw 27 enga ed therein as shown. The opposite end 0 the link is provided with a lug 28 as shown. 'The outer faces of the lugs are beveled inwardl to allowv pivotal movement of the links with respect to each openin other when connected by the pin 25, and it will be seen that by means of the set screw 27 the relative movement of the links may belimited, the end of the screw engaging against the adjacent face of the lug 28. Intermediately of the links 10 there 1s formed an o nin 29 for a purpose to be subsequen y in icated.

openings 29' formed through their adjacent flanges, as shown, to receive the ends of tie members 30, the latter being adapted to similarly engage and support adjacent uprights in spaced relation therewith. Tie

members 39 are similarly engaged in the 29 formed in the links 10, to hold the ad acent arch sections A in spaced relation. Disposed outwardly of the uprights presented in a vertical plane The up 'ghts 12 havespaced registering- 12, in spaced relation therewith, there are similar uprights held in spaced relation therewith by means ,of ties-32, comprising strips of sheet metal stamped to opposite engaging notches 33, the ties bein between the present g rods 12- and then turned laterally to enga e e rods the notches with opposite flanges of th to hold them against relative lateral 'movement.

The tie members 32 need have but one notch at one end, as shown, and the o posite end may be'provided with a series 0% notches to allow latitude in the adjustment of the space between the uprights 12.- Wall plates 34 are disposed inwardly of and against the uprights 12, and comprise blanks of sheet material having their opposite longitudinal ed es bent backwardly to stifien them longitu inally, and having a series of cross ribs 36 s aced throughout their length to prevent ben in of the plate laterally. 'The flanges 35 are isposed outwardly, so as to present a smooth face inwardly of the upright 12 to form a mold for a wall. Disposed inwardly of the plates 34 and adjacent to their ends there is an end member or gage 38 comprising two plate members 38 formed of sheet material coengaged slidably to -vary the width of the gage. One of the plates 38' has formed therethrough a series of laterally extending slots K and theopposite plate 38? carries a series of bolt members L disposed slidably in the slots and having nut members engaged outwardly of the coengaged plate to secure the plates adjustably in lateral relation. The member 38 serves to hold the form plates 34 in position, being placed inwardly of the tie members 32 which serve to prevent it from being forced outwardly by concrete when poured into the mold. It will be seen that a series of arch sections A may be thus constructed, and by means of tierods 39, engaged in the openings 29 formed in the sections 10 and u rights 12, the sectlons being secured in a justable spaced relation. Convex faced form plates 40 are disposed upon the outer face of the arch section 10 beginning at the base of the arch as shown, the lower of the convex plates being disposed closely against the upper of the form plates 34, as shown.

There is shown at 42 a disk having a series I of peripheral notches 44, the sides of which notches extend inwardl at varying an les with respect .to each other and adapte to form a gage for setting the links 10 of the arch sectionto form arches of a given degree h of curvature. In use, the disk is intended to be placed upon the head of the pin 25,

and one of the notches 44 disposed centrally over the junction between. the end faces of the lugs 26 and 28. The set screw 27 is then operated to bring the adjacent faces of the lugs 26 and 28 to the same relative angle that the sides of the notch 44 in the disk 42 indicate.

In Fig. 11, there is shown a modified form of connection for the links 10 in which the lug 28 is provided with a single lateral opening therethrough, and the lug 26-is provided with a plurahty of similar openings disposed at various distances from the end face of the lug. A small yoke member 45 is used to adjust the angle of the links and comprises a long arm 46 slidably engaged through the opening in the lug 28 and a spaced short arm 47 detachably engageable in one of the openings through the lug 26 and connected with the first arm by a bight portion 47. A head portion 28 is formed on the extremity against removal from the lug 28, as shown. It will be seen that the yoke 45 may be lifted from engagement with the lug 28, for adjustment in different openings tovary the relative angle of the attached sections 10. There is shown also in Fig. 11 a form of plate 40 adapted to be secured upon the section 10 permanently so that the section and attached plate may be retained in permanent engagement. It will be noted that the plate 40' has the link 10' secured laterally thereon, onelongitudinal edge of the plate being bent outwardly to receive the edge of an adjacent plate slidably thereunder. This is suitable for use in small structures though it is probably impracticable for structures of large size. It will be seen that the pin 25' connecting the links 10 extends laterally outwardly and the plates 40 carry pivoted hook members 49 engaged over the adjacent end portion of the pin 25, as shown.

In Fig. 3 there is shown a means for providing a retaining portion for an end wall form under an arch, which comprises removable arcuate plates 50 disposed in concentric series, a central semi-circular portion 51, a wall portion comprising uprights 53 of the same width as the sections 50, and an inner portion 54 of the same width as the portion 51. The inner portions of the sections 50 carry fastening members 55comprising metal plates secured across their outer end faces and projecting laterally beyond the edge of the plate a distance equal to the width of the sections, the projecting portions being offset outwardly of the remaining portion a distance equal to the thickness of the plate. Spaced tongues 56 having upwardly turned extremities are formed integrally on the edge of the plate 55 adjacent to the end of the attached plate 50 and turned laterally outward as shown. The projecting portion of the plate 50 carriesv hook -members 57 adapted to engage over the flanges 56 carried by an, adjacent member 50 when two such members are disposed in operative position, as shown. Plates 55 carrying only ated to bring the bars into close engagement of the arm 46 to hold it lar form adapted to closely flanges 56 are disposed upon the semi-circu lar portion 51 for engagement with the hook members 57 of attached portions 50. The adjacent edge portions of the members 51 and 54 carry plates similar to those first described. The adjacent end portions of the .outer sections of the end wall, as shown in Fig. 3, and the edge portions of the sections 51 and 54 are held securely in detachably coengaged position by means of a clamp member 58, comprising spaced bars 59 having bolts 60 coengaged therethrough and engaged over the adjacent flanges 56 of the various sections, as shown, the bolts 60 being operupon the flanges 56 to hold them securely against removal.

A wall portion similar to that shown in Fig. 3 may be disposed at the end of an arch and slightly inwardly thereof and a second similar wall portion disposed outwardly thereof in proper spaced relation, the outer retaining portion of the side walls, and arch being extended outwardly the distance desired for the thickness of the end walls, and bein in contact with the outer end retaining portion. It will thus be seen that an end wall may be constructed integrally with anarch in a very simple manner.

It will be noted that thewidth of the end wall and the radius of the arch may be varied by the removal or addition of sections 50 and 53 as will be understood. By the removal of the portions 51 and 54 and also the portion 53, if desired, it will be seen that a side retaining wall for a culvert may be formed, and by means of the addition of corner pieces 61 the wall may be built up and given square corners as will be understood. In order to form the inner retaining portion for the retaining wall of the culvert over an arch, a sufficient number of the sections 50 maybe disposed over an arch and secured thereon in spaced relation as will be understood. the sections also, if desired. 1

In Fig. 15, there is shown a modified form of end retaining portions for culverts which is well adapted to use with small structures, and comprises base side portions 62 having portions of their adjacent ends cut away to form a semi-circular opening 63 and having retaining members 64 disposed thereupon. There is shown in Fig. 14 a detail of the means for securing the outer ends of the members 64 in position which comprises strap members 65 fastened to the upper edges of the members 62 and 64, and T- shaped bars 66 attached to the lower edges of the members 64 and adapted to sliding engagement in the strap 65. The straps 65 are bowed outward at their center in anguenga'ge with the members 66 as shown. It will be understood, however, that if desired the first de- 51 being disposed thereon scribed form of securing means shown in f Fig. 16 may be substituted for the form just There is shown in Fig. 4 a dome for use 5 upon upright cylindrical structures which comprises segmental late members 70 having ooen mem ers similar to those described for olding the members 50 together and adapted to be'disposed upon the.

disposed upon one end against a cylindrical .25 circular frame comprising the sections and an outer retaimng portion disposed in spaced relation therewith after the manner above described. There is shown in Fi 4 a c lindrical collar member 70 adapte to be disposed centrall upon the dome portion to form a .vertica opening through the dome when constructed, for use as a manhole or otherwise. It will be understood that an suitable form of tie may be substituted or the form illustrated, including rods engaged through suitable 'openings formed in the uprights and secured by nuts .or other suitable means.

Fig. 12 illustrates a form of movable dia-' phragm adapted to be dis osed between the retaining plate of a wall fdrm, and adapted to be drawn upward as concrete is poured into the mold. The diaphragm is intended to form a partition to separate different kinds of material which may be found desirable to incorporate in a wall, to form a structure having diflt'erent structure on one side from that on the adjacent side. This would be of advantage in forming a wall 5 having a facing of close grain material and a backing of coarser material, it being thus possible to form a water-proof wall of any desired thickness, at relatively slight expense as compared to what it would cost ifmade entirely of material suflicientlyfine andcompact to resist the seepage of water.

- -The diaphragm consists of 'a central plate 80 having a pluralit of L-shaped members secured longltudinal y thereof to its upper edge and presenting horizontal arms 81 having spaced perforations therethrough. Re sihent L-shaped members 82- having 0 pcsite arms 83 and 84 extending at an ob lque angle,are secured to the arms 81 slidably by means of bolts 84 engaged through longibe found advantageous. It will be undering laterally projecting flanges,

tudinal slotswformed in the arms 82 to hold the diaphragm 80ad'ustabl at any point in the length of" the ot. he arms 82 are. pendent and directed slightly outward so that when the diaphragm is disposed between the 'retaini portions of a wall sec tion the arms 83 W111 enga e yieldably with the opposite sides of the orm to hold the diaphragm in spaced relation with the sides of the form. It will thus be seen that the diaphragm may be adjusted to an desired distance from either. side of a wall form to divide material when poured into the mold and adapted to be drawn upwardly to allow the segregated material to unite. go It will be understood that ordinary lumher or other suitable means may be utilized for the wall plates 34, and the end walls if desired. The use of the arcuate plate mem bers is particularly applicable in the construction of cisterns, wells, and man-holes Where circular and domed walls are necessary.

i What is claimed is:

1.- A side for a mold rality of sections, and means for holding said sections detachably in operative position, said means comprising plates carried at the inner edges of said sections and havand spaced bar members adapted to coengage with the flanges of adjacent sections and means for clamping said bars adjustably on said flanges.

2.- In an article of the class described, an arch support comprising a plurality of link members, said link members comprising a body portion longitudinally arcuate, an integral concentrically perforated ear projectin from one end thereof, spaced concentricall; perforated ears projecting from the opposite end and adapted for engagement over the sin le ear of a likev member, the end faces of the sections being beveled inwardly from the ears, and means for adjusting the relative angles of coengaged sections.

3. In an article of the class described an arch support comprising a plurality of sections, said sections each comprising a cast arcuate body portion, an integralconcentrically perforated earprojecting from one end comprising a plu- 90 of each section, spaced concentrically perforated ears pro ectingfrom the opposite ends, and coengage pivotally with the single ears of an ad acent section, said sections having In portions at their ends projecting lateral y 1n the lane of their are and being beveled inwardly from the ears, and means coengaged between adjacent ends of the sections for adjusting their relative angles.

4. In an article of the class described an arch support comprising a plurality of sec- ;tions, said sections eac comprising a. cast arcuate body portion, an integral concentrically perforated ear projecting from one end '13.

of each section, spaced concentrically perfobetween, said diaphragm comprising a parrated ears projecting from the opposite ends, tition member, L shaped members secured and coengaged pivotally with the single ears, thereto and presenting laterally extending said sections having lugs at their ends proarms, and L-sha ed members having horijecting laterally in the plane of their are zontal portions isposed slidably upon said 40 and being beveled inwar ly from the ears, arms and having pendent portions disposed each of said sections having a transverse respectively on opposite sides of the partiperforation at one end outwardly of the ears, tion portion and a clamping member ena U-shaped member provided with a long gaged with thehorizontal portion and arms;

and a short arm, the long arm being engaged 7 In a mold, the combination with upslidably in said perforation, means for rerights each comprising spaced members, of taining said arm against casual disengagea tie member comprising a strip of sheet mament therefrom, the opposite end of each of terial having longitudinally spaced notches the segments being provided with a pluformed in opposite sides, said tie being rality of transverse perforations var ably adapted to be, presented between the upspaced longitudinally of the section, said U- rights in a vertical plane, and twisted into a shaped member being adapted for movement horizontal plane to engage said uprights in to engage the short arm in said second named the notches for retention of the uprights in openings to secure adjacent sections adjustfixed spaced relation.

ably at difierent relative angles. 8. In a mold of the class described, the

5. In a device of the class described, a recombination of a plurality of segmental wall taining plate for mold sides comprising a sections adapted to be disposed edge to edge blank of sheet material having opposite edge in concentric relation, the ends of the raportions bent laterally at right angles to dially adjacent sections being in alinement,

form spacing flanges and having transversely lateral projections carried by the ends of extending ribs formed of L-shaped members the sections, and clamp bars adapted to cosecured between the flanges, said plates beengageoppositely with the pro ections of ing adapted to be disposed edge to edge with abutting Sec hon ends for support Of the Secsimilar plates to present a continuous smooth tl nS 1n rlgld relation.

, inner mold face. In testimony whereof I affix my signature,

6. The combination with amold for plastic 11 presence of tw witnesses. structures, said mold having spaced Wall FRANK S. FARRAR. portions, of a diaphragm member adjustably v"Witnesses: spaced intermediatel of said walls and MINA M. MARK,

adapted for vertical s iding movement there- F. H. RmewAY. 

